i have had quite a few LD's after sleeping for 7 or so hours then waking up for like 5 minutes and going back to sleep


in fact i had my first ld since starting back with practicing for lucid dreaming

time may very (i like to get alot of sleep 10=12 hours on weekends) so set your alarm for a few hours shorter than you normally like then wake up to turn it off and do something for a few minutes and go back to sleep